The weather observed at BOSTON, MA (KBOS) at 03:54 AM EST was: The skies were partly cloudy. Temperature: 30F ( -1C) Dewpoint: 17F ( -8C) Relative Humidity: 58% Winds from the NW (330 degs) at 10 mph. Pressure: 1021.6 millibars. Altimeter:30.17 inches of mercury. The prevailing visibility was 10 miles.